Work-presenting mechanism for sewing machines



T. I. HAYES. WORK PRESENHNG McHAmsM FOB SEWING MACHINES.

APPLICATION FILED AUG. h 1911- Patented Apr. 25, 1922.

2 SHEETS-SHEET 1.

T. J. HAYES.

WORK PRESENTING MECHANISM FOR SEWING MACHINES.

APPLICATION mm mm. 1911.

1 ,41 3,581. Patented Apr. 25, 1922.

2 SHEETS-SHEET 2.

n nventon Thomas \J. Huyis by k Anya.

said cam being driven 'ing a curved needle.

bender and bender actuating mechanism in elevation.

The present invention is illustrated heregenerally be described as of theflarbetter type which comprises a'bed plate 1, preferably provided with an upwardly pro ecting boss 2, formin the base for a standard 3 which carries t e usual overhanging arm 4 and head 5. The main shaft 6 is journalled in suitable bearings in-the standard and arm and is driven by a pulley 7 which may be clamped 'upon "the shaft by .the screw 8 or releasedtherefrom to permit the pulley to run freefor winding bobbins.

The head carries the needle actuating mechanism and complementa'l' stitch forming mechanism and as illustrated herein comprises a needle supporting-arm 9 pivotally mounted upon a shaft 10 in the upper portion otthe head,the lower end of the needle supportin arm bein bifurcated to provide journalsll for a needle bar 12 carryg The needle bar may-be and is oscillated through a link 13 actuated from the main shaft and connected to an arm 14 extending trom the needle bar. A lateral or sho'ggin movement is imparted to the needle through a cam 15 connected by a link 16 to the needle supporting arm 9.

by a gear 17 actuated from a companion gear 18 on the main shaft.

The take-up mechanism may be of any suitable character and is not illustrated herein. i

The complemental stitch forming mechanism preferably comprises a rotating loop taker located in a bracket 19 depending from the head of the machine. The hook bracket 19 also carries a presser foot 20 with which a vertically movable work support 21 co operates. This work support is preferably that used in the well known typeof Arbetter machine and: need not be illustrated herein as it forms no essential part of the present invention. i The work presenting mechanism may comprise any suitable form of mechanism for advancing the goods and any suitable bender mechanism with which my invention may be associated. Inasniuch as the work Feeding mechanism has no connection with the present invention, no specific form of feeding mechanism has been illustrated herein.

The preferred embodiment of the invention illustrated herein comprises a bender 22 which is rigidly secured to one end of a bender supporting member 23 which preferably is pivoted at its opposite end upon a shaft or pin 24 which is mounted in the lower portion of the boss 2 which extends upwardly from the bed plate so that the pivotal point of the bender supporting mom her is substantiall upon a level with the normal position oi the end ofthe bender.

The length of. the bender supporting member preferablyl is such that theworlrengaga ing end of t e bender Will--move substan tially normal to the plane of the bed plate and work support.

As illustrated herein which is rigidly secured by screws 26-190 the end of the header supporting-member 23; suitable dowel pins 27 being also employed the bender is L i shaped in form .having an extension .75

to provide a more rigid construction be tween the bender and its supporting memher. 1

The bender supporting member '23 is re ciprocated by a bender actuating inember l for reciprocating said actuating on the same shaft which engages oppositely dispose ways upon said actuating lever. UTheb'ender actuating end with alaterally extending boss 29 in which an adjusting screw ii0 is'seutedgrsaid adjusting screw being provided with "an extension 31 of decreased diameter which passes freely through an car 32 projecting from the bender supportin member beneath the boss 29. The lower end of thescrew threaded portion provides a shoulder 33 which may be adjusted down wardly to engage the ear32 of the bender supporting member and serve as an adjustment for the height to which the" bender adjusted for different thicknesses of goods, the uppermost elevation of the bender being limited by the contact of the ear,32 with th boss 29 so that the bender cannot be raised into the path of the needle. i The yieldable connection between the bender supporting member and the bender actuating lever may be located in any desired position but preferably is in proximity to the bender.

In the construction disclosed herein the bed plate is provided with a cup shaped recess 34 through which the end of the ad justing screw 30 extends, said screw being lever 28'is provided at its opposite" be raised so that the bender may be I provided with a knurled nut 35 by means of i extended hub 44' which a suitable set screw or a tapered co-op'eratingf The actuatin' lever 28 is provided with laterally extent ing ears or flanges 40, '41 to which Wear plates 42, 43a secured and the cam 36 fits closely withinthe space between said wear plates 42 43 so that the actuator, and consequently the bender, is given a positive movement in both the up? ward and downward directions and the range of movement of the bender thereby accurately determined The cam 36 has an is secured, to the shaft 37 b pin 45. he shaft 37 is rotatedthroughe train of iears comprising a rmtre gear 46 having a ub 47 secured to the shaft 37 and gear 48 having a hub 4=9 Se-- cured toa s mft 50 extending longitudinally of the'machine. The shaftjfitl'i's' j'ournalleft] in suitable bearing-s 51am] 5 2 seeuredto the under face of the bed plate and upon its 'end is providediwith an arm T lt-which is connected by e lin'lt 5 4 to anirrni 55 upon the end of a shaft 56 which is mounted in suitable bearings 57, 58 secured to the under side of the bed late. p

The axis of t'e shaft 56 preferably ex tends parallel to but is offset from the axis ofthe shaft 50, and the arms 53, 55 and link 54 are of such length and construction as to give the bender shaft 50 a difier'e'n'tial rotation relatively to the shaft '56.. Byrezr son of this-construction the bender cam '36 is'given a relatively long (lwellduring the time the bender raises the'work to present it to the needle and also during the time in which the bender is depressed to permit the feeding-forward of the work.

Furthermore by this construction the bender is quickly removed from the path of the feedingmechanism and all interference between the bender andfeeding mechanism avoided. l H

The shaft 56 is rotated through a spiral gear 59 which is. engaged by El. complementary spiral gear 60 upon the lower end; of u shaft 61 which is journalled in hearings in the standard and has :xtits upper end a bevelled gear (32 engaging a complementary gear 63 upon the main shaft of the machine.

The. mechanism thus described V stnntially identical with thetdisclosed in my prior n 'iplicution No. $108,279 aforesaid. In the mechanism thus described the bender actuating member or lever 28 is positively reciprocated upredetermined umount bli' tlie com 36 and the bender supporting member 23 is r'oi'respoudingl reciprocnted through the connection formed by the screw 31).

which is seated in the boss 29 0f the bender actuating" lever, the lower end of said screw engaging the car 32 upon the bender sup portingmember.

The helical spring which encircles the ex tension 31 of the screw 30 permits the bender to yield temporarily Whenever the seam but this encounters an obstruction such as a" yielding movement jof va rfiiitions time I'ndte'rial upon Avhi'ch it i operates andfi's likely to thrust too i'n'u'cho'f theworlrintothe path of the needfl'e wlieu i anextensive thick portion Qttheieork, such use pocket mechanism." 1 v The present invention contemplates the" is presented to the stitch forming provisionof supplementalmechanisin which may be oreadi'l for varying t o y when a greaterthickness of goods is" resented to the stitch forming mechanis'm r orin 'the sewing 'Ofa; arment."

' The preferred mec anismfor accomplish ing this purpose which isillustiatd herein position of thebeud'er .controlled by the operator comprises it disk 64 which-isrotatiibly'secured to "the bender;actuating'levelr 28, said diskfhaving an eccentric portion or cam 66 which engaged by one end ofa the oppositeend of said link being connected to a rocker arm fGSwl'iicli 'is'piv'otiilly mounted upon a stud ,69' seated in 'a-nexten sio'n .70 projedting downwiiridly from the bender supporting member 23.

'lhe'u'pper end of therocker arm ('38 desirably is provided with an 71 which engages tliefloi'iter edge'of the bender actn'atlng'le'ver 28. The axis of the rocker arm 68Iis no'rmitlly oblique to ii link per 'a'endiculargto the lower edgeoftlie aetuzi't-ing lever 28 so that'as the disk 64 is i-otated'in' the direction o'ftthe m-rm v,'-(1 Tig. 2) the rock'e'riarm t8 wi'llbefbroug ht toward a position normal to the plane of the lower edge :of "said lever and consequently"will link 67 antirricfion ,roller' force the bender supporting member dowin v ixtai' dly relative to the bender lever,

actuating; thus separatingthe ear 82 from con position other tl'iiin'that illusti'ated'in Fig. e afthedm'win By reason of this f constructioiiitlie Opel-a toris enebled to readily adjust the height of the bender duringjtlie -('ijpei-ation ofth machine for it is only necessary to rotate 'the disk 64 in the directiorr of the arrow to tense the bender to befloweied in the manner aforeseidfund this may be accomplished just as arelatively thiclr portion of the work, such as'la pocket is presented to the stitch. forming mechanism. When in the progress of tl1e n'oi'l the relatively thin. portion is again presented to the stitch. forming mechanism the operator can rotate theldis'lgin the reverse direction :ind restore the bender to its normal position without stn'lnpin'g the machine and without interfering with the normal adjustment of the bender which is fixed by the adjusting screw 30. y p r It 'is"de"sirab'le 'th'e'tthi's reverse movement and 3.

embodiment of my of the disk 64 be limited so that the operator will icnow when the bender has-been restored to its normal position and this is accomplished in the preferred embodiment of the invention illustrated herein by placing a. pin 72- in the path of the link 67. Thispin may conveniently be secured to" tbebender actuating lever 28 as illustrated in Figs. 2 The disk 64.- may be provided with suitable graduations which will enable the operator to determine instantly the position of the bender when the same is depressed by the rotation of thedislr 64; and if'desired. suitable means may be provided for arresting the rotation of the disk at a predetermined adjustment. The disk 64 preferably is provided with a series of notches which are adapted to be enga ed by a aw'l 73 to hold the dislcfin any resired ad uSted position.

It will be understood that the particular invention disclosed herein is illustrative and is not restrictive and that the invention contemplates any means for controlling this or any other form of bender mechanism within the meaning and scope of the following claims.

Having thus described my invention what I claim as new and desire to secure by Letters Patent is: v

1. Vl ork presenting mechanism for sewing machines comprising a bender, a bender supporting lever. a bender actuating memher and means for reciprocating the same, means yieldably wnnecting said bender supporting lever and said actuating member and manually adjustable means acting upon said bender actuating lever and bender sup porting member operable during the operation of the machine for varying the relative positions of said bender supporting levcr and said bender actuating member to control the thrust of the bender.

2. Work presenting mechanism for sewing machines comprising a bender and bender supporting lever, a bender actuating member and means for reciprocating the same, means adjustably connecting said bender supporting lever and said actuating member whereby the position of the bender ma be varied and supplemental manually adjustable means acting upon said bender actuating lever and bendersupporting member Operable during the operation of the machine for varying the relative position of said bender supporting lever and said actuating member to control the thrust of the bender.

3. Work presenting mechanism for sewing machines comprising a bender, a bender supporting lever. a bender actuating memher and means for reciprocating the same, means yieldably connecting said bender supporting lever and said actuating member to cause said bender actuating member to supportin operator.

reciprocate said bender supporting lever and manually operable means including" a cam acting: upon said'bender actuating lever andbender supporting member operable during the operation of the machine for varying the relativepositions of said bender lever and said actuating memher "where y, the thrust of the bender may be readily controlled by the operator.

4. lVork presenting mechanism for sewing machines comprising a' bender, 'a' bender supporting lever,. a bender actuating membeer and means for reciprocating the same, means yieldably connecting said bender sup porting lever and said actuating member to cause said bender actuating member to reciprocate said bender. supporting. lever and manually operable means including a cam carried by said bender actuating .mem-

ber for'varymg the relative positions of said bender supportin lever andsaid actuating member Where" the thrust of the header maybe readily controlled by the 5. Work supportinglmechanism tor sewing machines comprising a bender,a pivotally mounted bender supporting member, a bender actuating. lever, means yieldably connecting said bender supporting member to saidact-uating lever, means for recipro eating said lever, a cam rotatably mounted upon said bender actuating lever, manually operable r'neans for rotating said cam and means operable by said cam to change the relative positions of said bender supporting member and said actuating lever,

6. W'orlr supporting mechanism for sewing machines comprising a bender, a pivotally. mounted bender supporting member, a bender actuating lever, means yieldably connecting said bender supporting member to said actuating lever, means for recipro eating said lever, .a cam rotatably mounted upon said bender actuating lever,.manually operable means for rotating said cam, a rocker arm pivotally mounted upon said bender supporting member adapted to engage said actuating lever and means connecting said cam to said rocker arm whereby the rotation of said cam will cause the rocker arm to vary the relative positions of said bender supporting member and said actuating lever. v I

,7. In a blind stitch sewing machine comprising a bed plate, an overhringing arm supported thereby, a needle and complemental stitch forming mechanism and means for actuating the same carried by said overhanging arm; work presenting mechanism including a bender projecting through the bed plate and means for actuating said bender located below the bed plate, said means comprising a bender supporting lever, a bender actuating lever, moans yield ably connecting said bender supporting le bed ver and said bender actnating lever and means independent of said connecting means manually operable from above the bed plate for rarying the relative positions of said including a bender projecting through the bed platoiand means for actuating saidbenderlocated below the bed plate, said means compTising a'bender supporting lever, a bender actuating lever, -means yieldably and adjustabl connecting said bender'supporting le ver, a bender actuating lever, means y eld: ably connecting said bender supporting lever and said bender actuating lever and means independent of saidconnecting means manually operable from above the bed,

plate for varying the relative positions of sa d bender supporting lever and said bender actuating lever whereby the thrust of the bender-may be readily controlled.

In a blind stitch sewing machine comprising a bed plate, an overhanging arm supported thereby, a needle and oomplemental stitch forming mechanism and means for actuating the same carried by said overhanging arm; work presenting mechanism including a bender proj ecting through the bed plate and means for actuating said bender located below the bed plate, said means comprising a bender supporting lever, a bender actuating lever, means yie'ldably and adjustably connecting said bender supporting lever and said bender actuating lever and means inclependent of said connecting means manually operable from above the bed plate for vary-' mg the relative positions of said bender supporting lever and said bender actuating lever whereby the thrust of the bender may be readily controlled without varying ,the ad ustment of said connecting means.

In a blind stitch sewing machine comprising a bed plate, an overhan ing arm supported thereby, a needle .an mental stitch forming mechanism and means for actuating the shine cdrltied by said .overhanging'nrm; work presenting mechanism including a ibender projecting through the plate and means for actuating said bender located belov; the bed plate, said means eo'mprjs'inga bender supportinglever extending longitudinally of the bed p'late,-'a

bender actuating1 lever'exten'ding' 'in paral'lelismtheretvit means ieldabl and adjustably .connectlng the f ee en of said bender actuating lever to said bender supporting lever, mean sjindependent of said connect-mg means carried by said levers and whereby the thrust of the bende ereby the thrustof the compleo ar b e from la m'et eed pla e to ve y porting lever and said actuating "lever Y may e readily controlledbythe operator.

11 In a blind stitch sevving machine comt e relativegpositions of said bender sl p prising "a bed plate, an overhanging the supported thereby, a needle and complemental stitch formingmec'hanism and means i for actuating the samelcarried by said overhanging arm; work presenting mechanism including a bender projecting through the bed plate and means for actuating said bender located. belo y'the bed plate, said means comprising a bender supporting lever and ,n, bender actuating lever pivotally mounted upon'a common axis, means adjustably and yieldably ccnnectingthe said bender actuating lever to said bender supporting lever,.a rotatable cam engaging said actuating lever and supplemental bender controlling means including a cam mounted upon said actuatinm lever, a, rocker arm mounted upon said bender supportmgdever and engaging said actuating lever, a "link, connecting said cam to said rocker arm and a disk for rotating said cam projecting above the bed plate in a positionaccessible to the operator, f

12. Ina blind stitch sewing machine-com prising a bed plate, on overhanging a-rm supported thereby, a needle and complem'ental stitch forming mechanism and'means foractuating the same carried by said overhanging arm; Work presenting mechanism including a bender projecting through the bed plate and means for actuating" said bender located below the 'bed'pl a te said' means comprising a bender srusporting le-ver and a bender actuating lever pivotailly mounted upon a'oommon axis, means adjustaib' ly and yielcla'bly, connecting the said bender acti-iatin-glever to said bender sup porting" lever, a rotatable-cam engaging said actuating lever and supplemental bender control-ling means including a cam mounted upon said actuating lever, a rocker arm mounted upon said'bender supporting 'lc-' yer and engaging said actuating "lover,- a link connecting said cum to said rocker armand a disk for rotating said cam projecting above the bed plate in a. position accessible to the operator, and means positioned in the path of said link for-limiting the movement of said "d isk when the relative position of the bender supporting lever and'the actuatinglever havetbeen restored.

13; Work presenting mechanism for sew.

ing machines comprising a bender, a Ebender" supporting lever, a bender actuatin lever located adjacent thereto and in para, lelism therewith, means for reciprocating" said bender actuating lever, a yieldable mid -adj-usta ble connection between saidfsupporting lever and said actuating lever located adi jacent the end of the latter whereby the normal position ofthe bender may be adjusted, and supplemental means readily accessible to theoperatorfor varying the relative positions of 'the bender supporting lever and the actuating lever whereby the position ofthc bender maybe temporarily varied.

'14. Workpresentmg imechanism for sewing machines comprising a bender, a bender supporting lever, a bender actuating lever located adjacent thereto and in parallelism therewith and means for reciprocating the same, a yieldable and adjustable connection between said supporting .lever and said actuating lever whereby the normal positionofthe bender may be adjusted and Supplemental means readily accessible to the operator for varying the relative posi' tions of the bender supporting lever and the actuating lever whereby the position of the bender may be temporarily varied and means for arrestingthe movement of said manually operated means when the relative position of the bender supporting means and the bender actuating means have been re stored to normal.

15, Work presenting mechanism for sewing machines, having a bed plate, a needle and complementary stitch forming mechanism supported thereby, comprising a bender-supporting lever located beneath and pivoted'at one end to said bed plate and extending longitudinally thereof, a bender rigidly secured to the free end of said bender supporting lever and adapted to be projected through said bend plate in cooperative relation to said stitch forming mechanism, a bender actuating lever pi otally-mounted in said hcd plate and extending in parallelism with said bender supporting lever, means ,yieldably connecting said bender supporting lever to said bender actuating lever, and means for reciprocating the latter.

16. Work presenting mechanism for sewing machines, having a bed plate, a needle and complementary stitch forming mecha nism supported thereby, comprising a bender supporting lever located. beneath and pivoted at one .end to said bed plate and extending longitudinally thereof, a bender rigidly secured-to the free end of said bender supporting lever and adapted to be projected through said bed plate in co operative relation to said stitch forming mechanism, a bender actuating lever piv otally mounted in said bed plate and extending in parallelism with said bender sup- 7 porting lever, a yieldable and adjustable connection between said bender supporting lever and said bender actuating lever accessible from above the bed plate, and lmeans for actuating said bender supporting ever,

bender su ortinc lever and ada ted to be i l P n P projected through said bed plate in c0- operative relation to said stitch forming mechanism, a bender actuating lever pivotally mounted in said bed plate and extending in parallelism with said bender supporting lever, means connecting said bender supporting lever and said bender actuating lever, and a plurality of means operable from above the bed plate for relatively adjusting said" bender supporting lever and said bender actuatinglever Whereby the bender may be adjustedfor a particular class of work and while operating thereon be temporarily adjusted to provide for abnormal conditions.

18. W or]: presenting mechanism for sewing machines, having a bed plate a needle and complementary stitch forming mechanism supported thereby, comprising 'a bender supporting lever located beneathand pivoted at one end to said bed. plate and extending longitudinally thereof, abender upon the free end of said, lever adapted to be projected through'said bed plate in cooperative relation to the stitch forming n'icchanism. u bender actuating lever disposed in parallelism to said bendersup portinglever and yielclably connected thereto, SElKl bender actuating lever being provided with com engaging means, a

bender cum engaged thereby, and means for actuating said cam.

l9. Wort: presenting mechanism for sawing machines, having a bed plate a needleand complementary stitch forming mechanism supported therelzy, comprising a bender supporting lever located beneath and pivoted at one end to said bed plate and ex tending longitudinally thereof,- a bender upon the free end of said leveradaptedto be projected through said bed' plate in cooperative relation to the stitch, forming mechanism, u bender actuating leverdisposed in parallelism to said bender supporting lever and yieldably connected thereto, said bender actuating lever being provided with cam engaging means, a bender cam en gagcd thereby, and means fouimparting to said cum a variable speed otrotation whereby said bender will be given quick downward and upward movement and a prolonged dwell in its uppermost position.

ln testimony whereof, I have signed my nnme'to this specification. 

